A 52-year-old female presents to the emergency department with a subjective fever and mild… — USMLE Step 3

A 52-year-old female presents to the emergency department with a subjective fever and mild fatigue that started 12 hours ago. She is currently undergoing adjuvant chemotherapy (docetaxel and cyclophosphamide) for early-stage breast cancer, with her last cycle administered 10 days ago. Her temperature is $38.5^\circ\text{C}$ ( $101.3^\circ\text{F}$ ), blood pressure is $122/78\text{ mmHg}$ , pulse is $86/\text{min}$ , and respirations are $14/\text{min}$ . Pulse oximetry is $99\%$ on room air. Physical examination reveals a well-appearing woman who is alert and oriented. There is no focal source of infection; her lungs are clear, and there is no erythema at her port-a-cath site or signs of mucositis. Laboratory results show a white blood cell count of $800/\text{mm}^3$ with an absolute neutrophil count (ANC) of $350/\text{mm}^3$ . Her hemoglobin is $10.5\text{ g/dL}$ , platelets are $110,000/\text{mm}^3$ , and creatinine is $0.8\text{ mg/dL}$ . Blood cultures are drawn. Her Multinational Association for Supportive Care in Cancer (MASCC) risk index score is calculated to be 25. The patient is functionally independent, tolerates oral intake without nausea, and lives with her highly supportive husband in a home located 15 minutes from the hospital with reliable transportation. Based on her clinical status and objective severity scoring, which of the following is the most appropriate disposition and initial management plan?

Discharge home with a prescription for oral ciprofloxacin and amoxicillin-clavulanate, and arrange 24-hour outpatient follow-up.Answer
B
Admit to the general medical ward for administration of empiric intravenous cefepime.
C
Admit to the intensive care unit for continuous hemodynamic monitoring and intravenous broad-spectrum antibiotics.
D
Transfer to a skilled nursing facility for a 7-day course of intravenous antibiotics.
E
Place in the medical observation unit and delay empiric antibiotic therapy until initial blood culture results are finalized.

Answer

Discharge home with a prescription for oral ciprofloxacin and amoxicillin-clavulanate, and arrange 24-hour outpatient follow-up.

This patient presents with febrile neutropenia, an oncologic emergency requiring prompt empiric antibiotic therapy. However, disposition relies on careful risk stratification. The Multinational Association for Supportive Care in Cancer (MASCC) risk index is a validated tool used to identify low-risk patients. A MASCC score of

\ge 21

indicates a low risk of severe complications. This patient has a score of 25. Furthermore, she meets all necessary functional and social criteria for a safe care transition: she is hemodynamically stable, lacks organ dysfunction, tolerates oral intake (making oral antibiotics feasible), and has excellent home support with proximity to the hospital. In such cases, the evidence-based standard of care is to discharge the patient home with a prescription for broad-spectrum oral antibiotics (typically a fluoroquinolone such as ciprofloxacin combined with amoxicillin-clavulanate) and ensure strict 24-hour outpatient follow-up.

Step-by-Step Solution

Identify the patient's condition as acute febrile neutropenia based on fever (

38.5^\circ\text{C}

) and an absolute neutrophil count

< 500/\text{mm}^3

The patient has a potentially life-threatening oncologic emergency requiring immediate empiric antibiotics.

Establishing the primary diagnosis dictates the specific risk stratification pathway required.

Assess the objective severity score using the provided MASCC risk index.

The patient's MASCC score is 25. A score of

\ge 21

designates the patient as having a low risk for severe complications.

Objective severity scores are required to determine if a patient safely qualifies for outpatient versus inpatient management.

Evaluate the functional and social context to confirm whether a safe transition to home is feasible.

The patient tolerates oral fluids (essential for oral antibiotics), lives close to the hospital, has reliable transportation, and has excellent caregiver support.

Even with a low-risk score, patients lacking proper social support, telephone access, or the ability to take oral medications must be admitted.

Synthesize the clinical data to determine the optimal care setting transition.

The patient is eligible for direct discharge home from the ED with empiric oral antibiotics and a scheduled 24-hour follow-up.

This strategy avoids unnecessary hospital-acquired infections and optimizes resource utilization while ensuring patient safety.

Key Concept

Patients with low-risk febrile neutropenia (MASCC score >= 21) who have reliable social support and tolerate oral intake should be transitioned to home care with oral empiric antibiotics rather than admitted to the hospital.

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